Trait cfg::rule::GrammarRule

pub trait GrammarRule {
    // Required methods
    fn lhs(&self) -> Symbol;
    fn rhs(&self) -> &[Symbol];
    fn history_id(&self) -> HistoryId;

    // Provided method
    fn as_ref(&self) -> RuleRef<'_> { ... }
}

Trait for rules of a context-free grammar.

Required Methods

fn lhs(&self) -> Symbol

Returns the rule’s left-hand side.

fn rhs(&self) -> &[Symbol]

Returns the rule’s right-hand side.

fn history_id(&self) -> HistoryId

Returns a reference to the history carried with the rule.

Provided Methods

fn as_ref(&self) -> RuleRef<'_>

Implementations on Foreign Types

impl<'a, R> GrammarRule for &'a Rwhere R: GrammarRule,

fn lhs(&self) -> Symbol

fn rhs(&self) -> &[Symbol]

fn history_id(&self) -> HistoryId

Implementors

impl GrammarRule for BinarizedRule

impl GrammarRule for Rule

impl<'a> GrammarRule for RuleRef<'a>